#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<assert.h>

size_t my_strlen(const char * scr)
{
	assert(scr);
	size_t count = 0;
	while (*scr++)
	{
		count++;
	}
	return count;
}

int main()
{
	char arr[] = "abcdef";
	size_t len = my_strlen(arr);
	printf("%zd\n", len);
	return 0;
}